Java With the projects appearing below, one of your tasks during design is to plan how to convert it from a console application to a GUI application Operation This application will present a user with five choices: list, add, delete, help, and exit. Menu choices may be used, but buttons are often used. If the user chooses “list”, the application displays the customer data that’s stored in a text or XML file for persistent storage. If the user chooses “add”, the application prompts the user to enter data for a customer and saves that data to the persistent storage. If the user chooses “delete”, the application prompts the user for an email address and deletes the corresponding customer from the persistent storage. If the user chooses “help”, the application displays the usage information. If the user chooses “exit”, the application displays a goodbye message and exits. Specifications Create a class named Customer that stores data for the user’s email address, first name, and last name. Create interfaces named CustomerReader and CustomerWriter that define the methods that will be used to read and write customer data to persistent storage In addition, create an interface named CustomerConstants that contains three constants that specify the display size of a customer’s email address (30), first name (15), and last name (15). Then, create an interface named CustomerDAO that inherits all three of these interfaces. Create at least one persistence class that implements the methods specified by the CustomerDAO interface. Store the customer data. If you use a text or XML file which doesn’t exist, this class should create it. Create a class named DAOFactory that contains a method named getCustomerDAO. This method should return an instance of the persistence class. Create a CustomerMaintApp class that controls execution. This class should use the DAOFactory class to get a CustomerDAO object. Then, it should use the methods of the CustomerDAO object to read customer data from and write customer data to the persistent storage. Use the Validator class or a variation of it to validate the user’s entries. Non-empty strings are required for the email address, first name, and last name. Use spaces to align the customer data in columns on the console. To do that, you can create a utility class named StringUtils with a method that adds the necessary spaces to a string to reach a specified length. Add an “update” command that lets the user update an existing customer. This command should prompt the user to enter the email address. Then, it should let the user update the first name or last name for the customer. Add a method to the Validator class that uses string parsing techniques to validate the email address. At the least, you can check to make sure that this string contains some text, followed by an @ sign, followed by some more text, followed by a period, followed by some more text. For example, [email protected]” would be valid while “xxx” or “[email protected]” would not.
Why Choose HelpHub
Quality Researched Papers
We always make sure that writers follow all your instructions precisely. You can choose your academic level: high school, college/university or professional, and we will assign a writer who has a respective degree.
We have hired a team of professional writers experienced in academic and business writing. Most of them are native speakers and PhD holders able to take care of any assignment you need help with.
If you think we missed something, send your order for a free revision. You have 10 days to submit the order for review after you have received the final document. You can do this yourself after logging into your personal account.
On Time Delivery
All papers are always delivered on time. In case we need more time to master your paper, we may contact you regarding the deadline extension. We will always strive to deliver on time.
Original & Confidential
We use several writing tools checks to ensure that all documents you receive are free from plagiarism. Our editors carefully review all quotations in the text.
Our support agents are available 24 hours a day 7 days a week and committed to providing you with the best customer experience. Get in touch whenever you need any assistance.
Try it now!
How it works?
Follow these simple steps to get your paper done
Place your order
Fill in the order form and provide all details of your assignment.
Proceed with the payment
Choose the payment system that suits you most.
Receive the final file
Once your paper is ready, we will email it to you.
HelpHub Writing Services
No need to work on essay at night. Sleep tight, we will cover your back. We offer all kinds of essay writing services.
No matter what kind of academic paper you need and how urgent you need it, you are welcome to choose your academic level and the type of your paper at an affordable price. We take care of all your paper needs and give a 24/7 customer care support system.
An admission essay is an essay or other written statement by a candidate, often a potential student enrolling in a college, university, or graduate school. You can be rest assurred that through our service we will write the best admission essay for you.
Our academic writers and editors make the necessary changes to your paper so that it is polished. We also format your document by correctly quoting the sources and creating reference lists in the formats APA, Harvard, MLA, Chicago / Turabian.
If you think your paper could be improved, you can request a review. In this case, your paper will be checked by the writer or assigned to an editor. You can use this option as many times as you see fit. This is free because we want you to be completely satisfied.